Catalyst systems and polymerization processes for using the same

A catalyst system comprising the product of the combination of:

• a Group 4 metallocene catalyst represented by formula (I):
• wherein:
• M is a group 4 metal,
• X1 and X2 are independently a univalent anionic ligand, a diene ligand, an alkylidene ligand, or X1 and X2 are joined to form a metallocyclic ring, and further wherein:
• R1,R2, R3, and R4 are each hydrogen and R5 is R**—SiR*3 where each R* is independently C1 to C20 substituted or unsubstituted hydrocarbyl, and R** is C1 to C4 hydrocarbyl;
• each of R6, R13, R14, R15, and R16 is independently selected from hydrogen, halogen, C1-C40 hydrocarbyl, substituted C1-C40 hydrocarbyl, —NR′2, —SR′, —OR′, —OSiR′3, or —PR′2, wherein each R′ is independently hydrogen, halogen, C1-C10 alkyl, or C6-C10 aryl, or one or more of R14 and R15, and R15 and R16 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring;
• each of R7, R8, R9, R10, R11, and R12 is independently selected from hydrogen, halogen, C1-C40 hydrocarbyl, substituted C1-C40 hydrocarbyl, aryl, substituted aryl, —NR′2, —SR′, —OR′, —OSiR′3, or —PR′2, wherein each R′ is independently hydrogen, halogen, C1-C10 alkyl, or C6-C10 aryl, or one or more of R7 and R8, R8 and R10, and R10 and R12 are joined to form a saturated ring, unsaturated ring, substituted saturated ring, or substituted unsaturated ring;
• and
• an iron catalyst represented by formula (II):
• wherein:
• R6a and R15a are independently halogen, —CF3, hydrogen, or C1-C22-alkyl, or —OR′, each of R1a and R2a is independently hydrogen, C1-C22-alkyl, C2-C22-alkenyl, C6-C22-aryl, arylalkyl wherein alkyl has from 1 to 10 carbon atoms and aryl has from 6 to 20 carbon atoms, or five-, six- or seven-membered heterocyclyl comprising at least one atom selected from N, P, O and S, wherein each of R1a and R2a is optionally substituted by halogen, —NR′2, —OR′ or —SiR″3, wherein R1a optionally bonds with R3a, and R2a optionally bonds with R5a, in each case to independently form a five-, six- or seven-membered ring,
• each of R3a, R4a, R5a, R7a, R8a, R9a, R10a, R11a, R12a, R13a, and R14a is independently hydrogen, C1-C22-alkyl, C2-C22-alkenyl, C6-C22-aryl, arylalkyl wherein alkyl has from 1 to 10 carbon atoms and aryl has from 6 to 20 carbon atoms, —NR′2, —OR′, halogen, —SiR″3 or five-, six- or seven-membered heterocyclyl comprising at least one atom selected from N, P, O and S;
• wherein each of R3a, R4a, R5a, R7a, R8a, R9a, R10a, R11a, R12a, R13a, and R14a is independently optionally substituted by halogen, —NR′2, —OR′ or —SiR″3, X1a and X2a are independently halogen, hydrogen, C1-C20-alkyl, C2-C10-alkenyl, C6-C20-aryl, arylalkyl wherein alkyl has from 1 to 10 carbon atoms and aryl has from 6 to 20 carbon atoms, —NR′2, —OR′, —SR′, —SO3R′, —OC(O)R′, —CN, —SCN, β-diketonate, —CO, —BF4−, —PF6−or bulky non-coordinating anion, or X1a and X2a optionally bond to form a five- or six-membered ring,
• each R′ is independently hydrogen, C1-C22-alkyl, C2-C22-alkenyl, C6-C22-aryl, arylalkyl wherein alkyl has from 1 to 10 carbon atoms and aryl has from 6 to 20 carbon atoms, or —SiR″3, wherein R′ is optionally substituted by halogen or nitrogen- or oxygen-containing groups, or two R′ radicals optionally bond to form a five- or six-membered ring, each R″ is independently hydrogen, C1-C22-alkyl, C2-C22-alkenyl, C6-C22-aryl, arylalkyl wherein alkyl has from 1 to 10 carbon atoms and aryl has from 6 to 20 carbon atoms, wherein each R″ is optionally substituted by halogen or nitrogen- or oxygen-containing groups, or two R″ radicals optionally bond to form a five- or six-membered ring.